That's not how things work when you talk about "cause". There's all sorts of examples even in scientific studies - lots of negative effects were assigned to coffee that were not really related. Until someone was about to publish a correlation between coffee consumption and lung diseases, and paused for a second to say "wait a goddamn minute, could there be a correlation between coffee consumption and smoking? Like, people also smoking a cigarette when they drink their coffee?" It's not A before B before C, coffee was never the cause for respiratory disease. Just like "import" is not the cause for avocado popularity.